Avaliação da acurácia dos modelos dentários digitais obtidos para cirurgia ortognática
The objective of this experimental study was to evaluate the accuracy of digital models generated by two scanning techniques (intraoral scanner - Itero 5d Element® - and desktop scanner -Straumann ®) of an experimental model of the upper arch (Nacional Ossos ®) made of polyurethane and the plaste...
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| Formato: | doctoralThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/47063 |
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| Resumo: | The objective of this experimental study was to evaluate the accuracy of digital
models generated by two scanning techniques (intraoral scanner - Itero 5d Element® - and
desktop scanner -Straumann ®) of an experimental model of the upper arch (Nacional Ossos
®) made of polyurethane and the plaster model obtained from this arch. Points A – 3mm
above element 17; B – 3mm above element 14; C – 3mm above element 24; D – 3mm above
element 27; E – mesiobuccal cusp of element 16; F - most incisal point of contact between
elements 11 and 21; G - Mesiobuccal cusp of element 26 were used as a reference for the
measurements performed. The measurements were performed in a surgical simulation
software (Geomagic ®) and analyzed for the validity and precision of the scanning techniques
used in all groups (1 to 5). Group 1 corresponds to the gold standard group; 2 to the
scanning group with intraoral scanner of the polyurethane model; 3 to the desktop scan
of the model; 4 to intraoral scanner scanning of the plaster model; and 5 to the desktop
scan of the plaster model. In the validation analysis, all techniques showed to be valid
compared to the control group, except the FG measure, which showed statistically significant
differences (p<0.05) between groups 1 and 2. Precision was assessed using the intraclass
correlation(ICC) index, and all techniques were highly accurate with an ICC close to 1. Thus,
it is concluded that the intraoral scanner and the bench scanner used in this study were reliable
compared to the control group and that the two scanner models used presented themselves
with high precision. |
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